Drill



Dec. 8, 1925- 1,564,460

F. L. YOUNG DRILL Filed Sept '7, 1923 2 Sheets-Sheet 1 INVENTOR F. L.- YOUNG Dec. 8, 1925- 2 $beets-Sheet 2 I NVENTOR ATTORNEY Patented Dec. 8, 1925.

7t X t rse ff lhl ll it initia to FRANK L. YOUNG, OI" VfIIli'DSOR,

1,564,4tid

CQIQ'HECTIC'UT, ASSJIGIt-IQR, BY MESZIE ASSIGNMENTS,

Application filed September 7, 1923.

To all whom it may concern:

Be it known that I, FRANK L. YOUNG, a citizen. of the United States, and resident of Windsor, in the county of Hartford and State of Connecticut, have invented certain new and useful improven'ients in Drills, of which the following is a specification.

This invention is an improved portable motor-driven drilling machine of the general type in which a single portable casing encloses the rotary motor and bearings for the drill spindle, and conceals the powertransmittingconnections between said motor and spindle.

()ne object of the present invention is to so construct the parts that the drill may be employed for drilling holes in one wall close to and parallel with the line of intersection of two other walls at right angles to each other and t0 the first mentioned wall, as for instance vertically into a floor close to the corner of a room. In my improved c011- struction the only part limiting the distance from the corner of the room at which the drill may be placed, is the drill-carrying chuck itself.

A further object of my invention is to provide a simpler and more conveniently located means for controlling the application of motive fluid to themotor. If the motor be an electric one, such controlling means in the form of a switch which may be operated by a button or other operating member directly on the handle, the said switch having its parts thoroughly and effectively protected, but at the same time readily accessible for cleaning, inspection or repair.

A further object of my invention is to provide a spirit level so positioned that the holding of the drill in ahorizontal position is facilitated. The spirit level is positioned in the cover or casing for the switch so that it is readily removable from. the drill casing in case it is necessary to readjust or replace it.

Other important features will be pointed out hereinafter, or will be apparent from a consideration of the drawings and description of a preferred embodiment.

in the accompanying drawings:

Fig. 1 is a side elevation of my improved construction.

Fig. 2 is another side elevation taken at right angles to the plane of Fig. 1.

Fig. 3 is a top plan view.

DRILL.

Serial No. 661,384.

Fig. 4 is a vertical section on the line l-4l of Fig. 2 on a larger scale and showing the parts of the switch and spirit level.

Fig. 5 is a face view of the switch parts, the cover being removed.

Fig. 6 is a transverse section on the line. 6-6 of Fig. at, and

Fig. '1' is a transverse section on the line 7-7 of Fig. 1, but on a larger scale.

in the accompanying drawings T have not illustrated thevdetails of construction of th motor for driving the drill spindle. This motor may be of any suitable rotary type. So far as certain features of my invention are concerned this rotary motor may be operated by compressed air, steam or other motive fluid, but so far as other features of the invention are concerned, the motoris necessarily an electric motor. The rotary'motor, irrespective of its character, is mounted in a cylindrical casing 10 having removable top and bottom end walls 11 and 12. The top wall or cover plate 11 is preferably formed integral with a handle 13 of what may be called the spade handle type, that is, it provides a hand grip portion 14 approximately parallel to the plane of the main cover plate and having each end rigidly connected thereto by arm portions 15 and 16. The bottom wall or plate 12 constitutes a casing for the transmission gearing from the main shaft 17 of the motor to the spindle 18 of the drill, and includes a bearing sleeve 19 for said spindle. This bearing sleeve is of approximately the same diameter as the drill chuck 20. The spindle bearing sleeve 19 is parallel with but eccentrically disposed in respect to the body portion of the casing. As one important feature of my invention the extent of the eccentricity is such that the sleeve projects out beyond the periphery of the casing and the two lines of tangency -15 and B-G indicated in Fig. 7 intersect at an angle not materially greater than a right angle. By making the eccentricity such that these two common tangents intersect at a right angle, the tool may be placed, in the corner of a room with the line A-B representing one wall and the line BC representing another wall at right angles thereto. When in this position the drill chuck will have its outer surface almost but not quite touching said walls, so that the drill may be freely rotated and a hole drilled at a distance from the walls which is only very slightly greater than the radius of the drill chuck. The bottom plate 12 has a projecting rib portion 21 with its outer surface in alignment with the portion of the outer surface of the sleeve 19 which is outside of the circle oi the body portion of the end plate, and the cover plate 11 has its arm portion or support 16 for the hand grip also extending out beyond the circle of the main portion ot' the cover plate so as to include a projection 22, the outer surface oi which is in alignment with the outer surlace oi the sleeve 19 and the projecting flange 21. Thus the drill may be held parallc to the vertical walls adjacent to which the hole is to be drilled, by the contact with said walls of parts of both the plates 11 and 12 which are at opposite ends or the main casing.

As one important feature Of my invention 1 mount the switch for controlling the motor on the outer surface of the main casing between the projecting portions 21 and 22, and so design the switch that no part thereof projects radially beyond the outer suriiace of these projecting parts. The switch shown includes an insulation block 23 secured to the surface of the drill casing 10 in any suitable inanner as for instance by a couple or screws. Secured to the opposite side oi this insulation block are the two switch contacts 2%, each of which is connected to its corresponding wire 25 in the circuit of the motor. The wires preferably pass through the wall of the casing 10 closely adjacent to the switch contacts, so that very little of these wires is exposed. The movable member or the switch includes a plunger having a head 26 of insulation material and a conducting collar 2'? at one end which, wuen the head is moved endwise, engages with the two switch contacts 2%. The head is carried by a pl r 28 which is endwise movable in the supporting arm 16 oi the handle. The plunger has a coil spring 29 normally tending to mo e it upwardly to break the electric circuit. The spring cperatesbetween the collar 30 on the plunger member, and a stop 81 screwed into the lower face of the projection 22. The hand grip portion is 01: the handle has a passage 32 therein which intersects the passage acting as a guide for the plunger member 28. These two passages are at approximately right angles although slightly at an obtuse angle. l Vithin the passage 32 is a slide 33 which has a pointed end or cam part which may ride over the upper end 85 of the plunger and force the latter downwardly. When the slide is moved to the limiting position the end 35 oi" the plunger comes beyond the cam portion and the parts will automatically remain in position. The outer end of the passage 32 may be closed by a small screw plug 36. Any suitable means may be employed "for operating the ace ice slide 33. As shown there is provided a button 3? which has a threaded spindle rigidly securin it to the slide 33 and movable back and rorth in a slot 38 in the upper side of the hand grip portion 1a of the handle. T his button thus comes closely adjacent to the normpl thumb position of an operator grasping the handle 13, and thus by moving the button back and forth the switch may be openet oi the cam ends 8% and it will be noted that the slide 38 Will be forced back the instant it is moved back to a short distance so that ii ere will be a quick break of the circuit at the contacts 24; and

The position or the switch is important not only because of the possibilities which it affords tor simple operating mechanism and for the protecting oi the switch parts behind the contour oi the projections 21 and but also liiecause ol' the facilities which are oii'ered l'orthe attachment of a simple cover member. This cover member is shown as of approin tcly crescent shape in cross section with the inner surface curved to follow the contour of the cylindrical casing 10 and the outer surface curved to conform to the outer surface of the projections 21 and 22. The cover member has a chamber or cavity ll opening rearwardly at the upper portion so as to receive and enclose the switch parts. The cover member may be secured in place in any suitable manner as for instance by screws a2 extending through the inargii'ial portion into the casing 10. Below this switcl -receiving chamber the body of the cover is provided with a vertically disposed opening 4L3 within which is mounted the bulb or tube 4% or a spirit level. This is properly positioned in respect to an opening or window li} in the wall ot the cover and is sealed and held in position by any suital'ile self-hardenin composition 46 such as plaster of Paris, which, together with the tube as, completely fills the passage 1-3. it will be noted that in case the tube 1- breaks or leaks or is found to be not properly positioned in respect to the axis of the dri ll, it is not necessary to send tie whole drill baclr to the tactor for repair, as the cover is the only part carrying this spirit level. The cover being easily removable permits the parts of the switch to be quickly and easily inspected or adjusted, and the removal or the cover does not disturb any of the electrical connections. The cover serves not only to protect and conceal the switch parts, but also to carry the spirit level and to form a continuation of the projections 21 and 22 and give the drill a smooth, continuous, vertical surface.

Even though the switch is on the same side of the casing as the drill spindle it is preferable that the electric wire connection to the drill be upon the opposite side so'as l and closed. Py reason to not interfere with the drilling closely adjacent to a corner. As shown a bracket as is secured to the casing 10 oppos te to the cover and to this bracket is secured a supplementary handle all in the form of a horizontal rod or tube, and a clutch member 48 for receiving and retaining the end of the cable l9. Thus the cable and the handle all are diametrically opposite to the position of the drill so as to not in any Way interfere with the positioning of the latter.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A power driven drill including a cylindrical casing for the prime mover, said casing being provided at one end with a spindle bearing sleeve eccentric in respect to the casing and of smaller diameter, a portion or" said sleeve extending beyond the periphery of the casing, a drill spindle, and a drill chuck of approximately the diameter of the sleeve, the two planes tangent to the casing and sleeve intersecting at approximately a right angle.

2. A power drill including a cylindrical motor casing having projections adjacent to the opposite ends and presenting curved surfaces having .straight line elements in alignment, and parallel wi h the axis of the casing, the two planes tangent to the casing and the projections intersecting at approximately a right angle.

3. A power driven drill including a cylindrical casing for the prime mover, a pair of projections presenting cylindric surfaces in alignment with each other lei'igthwise of the casing, the common axis of said cylindric surfaces being parallel to the axis of the casing, the two planes tangent to the casing and projections intersecting at approximately a right angle.

4. A power driven drill including a cylindrical casing for the prime mover, a pair of projections presenting cylindric surface"; in alignment with each other lengthwise of the casing, the common axis of said cylindric surfaces being parallel to the axis of the casing, the two planes tangent to the casing and projections intersecting at approximately a right angle, and a drill chuck coaxial with said projections and having its spindle rotatably mounted in one of them.

power driven drill including a cylin- (ll'lCt l casing for the prime mover, said casiu having laterally projecting portions adj :ent to opposite ends thereof, the two angent to said casing, and said projecting portions intersecting at approximately a right angle, means on the exterior of the casing between said projections for controlling the prime mover and a cover protecting said controlling means and with in the angle between said planes.

4%. A power driven drill including a cylindrical motor casing having top and bottom plates provided with aligned laterally ex-.

tending projections for engaging with a wall to guide the drill parallel to said wall, a handle rigid with one of said plates, a controlling switch between said projections, and means carried by said handle for operating said switch.

8. A power driven drill including a cylindrical motor casing having top and bottom plates provided with aligned laterally extending projections for engaging with a wall to guide the drill parallel to said wall, a controlling switch between said projections, and a cover plate for said switch having its outer surface substantially following the contour of said projecting portions.

9. It power driven drill including a cylindrical motor casii'ig, a switch mounted upon the exterior of said casing, a handle rigidly secured to the top of said casing, a. switchoperating rod carried by said handle outside of the periphery of the casing, and movable in the general direction of the length of the casing for operating said switch, and a slide on said handle, movable at an angle to said operating rod for controlling the latter.

10. A power driven drill including a motor casing, a controlling switch upon the exterior thereof, a top plate having a handle rigid therewith, and including a portion disposed radially beyond the periphery of the body of the casing, and a longitudinally movable rod mounted in said projecting portion for operating the switch.

11. A power driven drill including a cylindrical motor casing, top and bottom end plates having aligned portions projecting radially beyond the periphery of the body of the casing for engaging with a wall to guide the drill parallel to said wall, the projecting portion of one plate forming a portion of the spindle bearing and the projecting portion of the other plate having a switch operating member, a switch mounted on the outer surface or" the casing between said projecting portions, and a cover plate for said switch having its outer surface conforming in contour to said projecting portions for controlling the latter.

12. A power driven drill including a cylindrical motor casing, top and bottom end plates having aligned radially projecting portions, a switch mounted on the exterior of the casing between said projecting portions, and a cover plate for said switch also mounted between and protected by said pro.- jecting portions.

18. in power driven drill including 2L1I10 ior casing haringradially projecting portions adjacent to opposite ends thereof and having eylindrie surfaces in alignment with each other lengthwise of the casing, the aligned zines o'f'said projections; being parallel to the axis of (he casing and a member seemed to said casing between said project ing portions and removable therefrom, said 10 member havin a spirit level curried fiherehy.

O M. A power driven drill including a molor easing having n switch mounted upon the exterior of the peripheral wall thereof, 21 cover plale having a handle including a handgrip portion :uidend port-ions connectin;; the letter with the cover plate, oneof said end portions projecting radially beyond the periphery of the motor casing, a switch operating rod movable endwise in said last mentioned end portion, a slide movable endwise in said hand grip portion for moving said operating rod, and a button on the upper surface of the hand grip portion and cmineel'ed ito said slide.

Signed ai East l lartford, in the county of Hartford and State of'Conneetieut, this 25th day of May, A. D. 1923.

FRANK l1. YOUNG. 

